Another 680 limps in Las

[Charley Jones]

When I turn on the device in run mode, all switches down, all lights but HLT, A4, and D5 blink. If I hit HLT, then HLT lights. Good. Re-soldered switches s and LED A4 and D5. No change.

In HLT, A4 up, it does light

Going to take the board off and re-solder header pins. And go over the resistor packs again.

[Chris Davis]

That sounds like the correct behavior, what are you expecting to see?  The LEDs are showing the current memory locations. In RUN mode the 256-byte monitor ROM is running in the FF00-FFFF range in a loop waiting for keystrokes.